A Photoacoustic Imaging Algorithm Based on Regularized Smoothed L₀ Norm Minimization

Table 1

Numerical results of reconstructed images.

Experimental	CPU time (seconds)				PSNR (dB)				NMAE
Positions	TwIST	SPG	SL0	ReSL0	TwIST	SPG	SL0	ReSL0	TwIST	SPG	SL0	ReSL0
5	0.69	11.76	0.52	0.77	11.8	11.93	11.95	12.11	104.93	103.34	103.08	101.25
10	1.1	12.3	1.09	1.45	12.57	13.27	12.65	13.21	96.01	88.58	95.17	89.15
15	1.93	22.76	1.86	2.18	13.34	14.78	14.14	14.68	87.87	74.48	80.12	75.31
20	2.58	26.07	2.51	2.81	14.65	16.04	15.6	16.11	75.53	64.35	67.77	63.84
25	3.32	28.67	3.36	3.71	16.01	17.34	16.8	17.2	64.61	55.47	59	56.37
30	3.9	51.92	4.04	4.45	17.03	18.94	18.05	18.94	57.46	46.09	51.1	43.99
35	2.65	46.86	4.77	5.14	18.35	21.45	20.22	21.66	49.34	33.7	39.79	31.63
40	3.59	30.22	5.41	5.77	19.7	30.23	23.9	30.23	42.26	12.57	26.06	11.66
45	4.04	29.03	6.44	6.8	21.3	42.66	40.31	60.93	35.16	3.01	3.94	0.37
50	3.08	28.8	7.11	7.61	24.5	61.36	83.65	113.5	24.3	0.35	0.03	0.001
Average	2.69	28.84	3.71	4.07	16.93	24.80	25.73	31.86	63.75	48.19	52.61	47.36